Trane WC-IOM-7 User Manual
Installation
Operation
Maintenance
Packaged Heat Pump
Model Number
WC*150B***G* WC*155B***G* WC*180B***G*
WC*200B***G* WC*240B***G*
December 2004 WC-IOM-7
Warnings and Cautions
NOTICE: Warnings and Cautions appear at appropriate sections throughout this
literature. Read these carefully.
WAR NIN G: Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury. It may also be used to alert against
unsafe practices.
NOTICE: Indicates a situation that may result in equipment or property-damage
only accidents.
Overview of Manual
Note: One copy of this document ships inside the control panel of each unit and
is customer property. It must be retained by the unit’s maintenance
personnel.
This booklet describes proper installation, operation, and maintenance
procedures for air cooled systems. By carefully reviewing the information within
this manual and following the instructions, the risk of improper operation and/or
component damage will be minimized.
It is important that periodic maintenance be performed to help assure trouble
free operation. A maintenance schedule is provided at the end of this manual.
Should equipment failure occur, contact a qualified service organization with
qualified, experienced HVAC technicians to properly diagnose and repair this
equipment.
Model Number Description
All products are identified by a multiple-character model number that precisely
identifies a particular type of unit. An explanation of the alphanumeric
identification code is provided below. Its use will enable the owner/operator,
installing contractors, and service engineers to define the operation, specific
components, and other options for any specific unit.
When ordering replacement parts or requesting service, be sure to refer to the
specific model number and serial number printed on the unit nameplate.
© 2008 Trane All rights reserved WC-IOM-7
WARNING
Contains Refrigerant!
System contains oil and refrigerant under high pressure. Recover refrigerant to
relieve pressure before opening the system. See unit nameplate for refrigerant
type. Do not use non-approved refrigerants, refrigerant substitutes, or refrigerant
additives.
Failure to follow proper procedures or the use of non-approved refrigerants,
refrigerant substitutes, or refrigerant additives could result in death or serious
injury or equipment damage.
WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote disconnects and discharge all
motor start/run capacitors before servicing. Follow proper lockout/tagout
procedures to ensure the power cannot be inadvertently energized. Verify with
an appropriate voltmeter that all capacitors have discharged. Failure to
disconnect power and discharge capacitors before servicing could result in death
or serious injury.
NOTICE
Equipment Damage From Ultraviolet (UV) Lights!
The manufacturer does not recommend field installation of ultraviolet lights in
its equipment for the intended purpose of improving indoor air quality. High
intensity C-band ultraviolet light is known to severely damage polymer (plastic)
materials and poses a personal safety risk to anyone exposed to the light
without proper personal protective equipment. Polymer materials commonly
found in HVAC equipment that may be susceptible include insulation on
electrical wiring, fan belts, thermal insulation, various fasteners and bushings.
Degradation of these materials can result in serious damage to the equipment.
The manufacturer accepts no responsibility for the performance or operation of
our equipment in which ultraviolet devices were installed outside of the
manufacturer’s factory or its approved suppliers.
WC-IOM-7 • Packaged Heat Pump 3
Contents
Contents
Model Number Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Unit Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Compressor Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Unit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Economizer Control Actuator ReliaTel™ Control . . . . . . . . . . . . . . . . . . . . . . . 7
RTCI -- ReliaTel™ Trane Communication Interface (Optional) . . . . . . . . . . . . . 7
RLCI - ReliaTel™ LonTalk Communication Interface (Optional) . . . . . . . . . . . . 8
RTOM – ReliaTel™ Options Module (Optional) . . . . . . . . . . . . . . . . . . . . . . . . 8
System Input Devices & Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Supply Fan Failure Input (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Clogged Filter Switch (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Low Pressure Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
High Pressure Control (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Unit Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Unit Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Foundation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Horizontal Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
General Unit Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Factory Installed Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Main Electrical Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Electric Heat Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Low Voltage Wiring (AC & DC) Requirements . . . . . . . . . . . . . . . . . . . . . . . . 22
Condensate Drain Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Filter Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Field Installed Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Main Unit Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Smoke Detector Customer Low Voltage Wiring . . . . . . . . . . . . . . . . . . . . . . . 28
Space Temperature Averaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Voltage Imbalance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Compressor Crankcase Heaters (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
ReliaTel Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Pre-Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Test Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Verifying Proper Air Flow
(Units with Belt Drive Indoor Fan)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Economizer Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Compressor Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Heating Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Final System Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Fan Belt Adjustment - Belt Drive Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Monthly Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
4 WC-IOM-7
Contents
Cooling Season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Heating Season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Final Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
ReliaTel Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
System Status Checkout Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
System Failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Method 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Resetting Cooling and Heating Lockouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Programmable & Digital Zone Sensor Test . . . . . . . . . . . . . . . . . . . . . . . . . . 53
ReliaTel Refrigeration Module (RTRM) Default Chart . . . . . . . . . . . . . . . . . . . 54
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Heat Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
WCZ, WCY, WCX, WCC, WCD, WCH, WCM, WCP and WSC (Parts Only). . . . 57
Models Less Than 20 Tons for Commercial Use*. . . . . . . . . . . . . . . . . . . . . . 57
Heat Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Standard Equipment Warranty Terms and Conditions. . . . . . . . . . . . . . . . . . 58
Commercial Equipment Warranty and Liability . . . . . . . . . . . . . . . . . . . . . . . 58
Models Larger that 20 Tons for Commercial Use* . . . . . . . . . . . . . . . . . . . . 58
WC-IOM-7 5
Model Number Description
WC D 1 5 0 C 3 0 0 B A
1 2 3 4 5 6 7 8 9 10 11 12
Digits 1, 2 - Product Type Digit 8 - Electrical characteristics
WC = Packaged cooling, electric heat 3 = 208-230/60/3
WF = With factory installed options 4 = 460/60/3
D = 400/50/3
Digit 3 - Airflow Configuration T = 380/60/3
D = Downflow W = 575/60/3
H = Horizontal
Digit 9, 10 - Factory installed options
Digit 4, 5, 6 - Nominal gross cooling capacity (MBh) 00 = No factory installed options
150 = 12 1/2 tons standard efficiency 0A = Factory-installed economizer
180 = 15 tons standard efficiency 0B = Oversized motor
240 = 20 tons standard efficiency 0C = Downflow economizer/oversized motor
0F = Trane communications interface (TCI)
Digit 7 - Major development sequence 0G = Downflow economizer/TCI
Digit 11 - Minor design sequence
Digit 12 - Service digit
6 WC-IOM-7
General Information
Unit Nameplate
A Mylar unit nameplate is located on the unit’s corner support next to the control
box. It includes the unit model number, serial number, electrical characteristics,
refrigerant charge, as well as other pertinent unit data.
Compressor Nameplate
The nameplate for the compressors are located on the side of the compressor.
Unit Description
Before shipment, each unit is leak tested, dehydrated, charged with refrigerant
and compressor oil, and run tested for proper control operation.
The condenser coils are aluminum fin, mechanically bonded to copper tubing.
Direct-drive, vertical discharge condenser fans are provided with built-in thermal
overload protection.
The ReliaTel™ Control Module is a microelectronic control system that is referred
to as “Refrigeration Module” (RTRM). The acronym RTRM is used extensively
throughout this document when referring to the control system network.
This module through Proportional/Integral control algorithms perform specific
unit functions that governs unit operation in response to; zone temperature,
supply air temperature, and/or humidity conditions depending on the
application. The stages of capacity control for these units are achieved by starting
and stopping the compressors.
The RTRM is mounted in the control panel and is factory wired to the respective
internal components. The RTRM receives and interprets information from other
unit modules, sensors, remote panels, and customer binary contacts to satisfy
the applicable request for cooling.
Economizer Control Actuator ReliaTel™ Control
The ECA monitors the mixed air temperature, return air temperature, minimum
position setpoint (local or remote), power exhaust setpoint, CO2 setpoint, CO2,
and ambient dry bulb/enthalpy sensor or comparative humidity (return air
humidity against ambient humidity) sensors, if selected, to control dampers to an
accuracy of +/- 5% of stroke. The actuator is spring returned to the closed
position any time that power is lost to the unit. It is capable of delivering up to 25
inch pounds of torque and is powered by 24 VAC.
RTCI -- ReliaTel™ Trane Communication Interface (Optional)
This module is used when the application calls for an ICSTM building
management type control system. It allows the control and monitoring of the
system through an ICS panel. The module can be ordered from the factory or
WC-IOM-7 • Packaged Heat Pump 7
General Information
ordered as a kit to be field installed. Follow the installation instruction that ships
with each kit when field installation is necessary.
RLCI - ReliaTel™ LonTalk Communication Interface (Optional)
This module is used when the application calls for an ICSTM building
management type control system that is LonTalk. It allows the control and
monitoring of the system through an ICS panel. The module can be ordered from
the factory or ordered as a kit to be field installed. Follow the installation
instruction that ships with each kit when field installation is necessary.
RTOM – ReliaTel™ Options Module (Optional)
The RTOM monitors the supply fan proving, clogged filter, supply air
temperature, exhaust fan setpoint, supply air tempering, Frostat™ and smoke
detector. Refer to system input devices and functions for operation.
System Input Devices & Functions
The RTRM must have a zone sensor or thermostat input in order to operate the
unit. The flexibility of having several mode capabilities depends upon the type of
zone sensor or thermostat selected to interface with the RTRM.
The descriptions of the following basic Input Devices used within the RTRM
network are to acquaint the operator with their function as they interface with the
various modules. Refer to the unit’s electrical schematic for the specific module
connections.
The following controls are available from the factory for field installation.
Supply Fan Failure Input (Optional)
The Fan Failure Switch can be connected to sense indoor fan operation:
FFS (Fan Failure Switch) If air flow through the unit is not proven by the
differential pressure switch connected to the RTOM (factory set point 0.07 “ w.c.)
within 40 seconds nominally, the RTRM will shut off all mechanical operations,
lock the system out, send a diagnostic to ICS, and the SERVICE output will flash.
The system will remain locked out until a reset is initiated either manually or
through ICS.
Clogged Filter Switch (Optional)
The unit mounted clogged filter switch monitors the pressure differential across
the return air filters. It is mounted in the filter section and is connected to the
RTOM. A diagnostic SERVICE signal is sent to the remote panel if the pressure
differential across the filters is at least 0.5" w.c. The contacts will automatically
open when the pressure differential across the filters decreases to approximately
0.4" w.c. The clogged filter output is energized when the supply fan is operating
and the clogged filter switch has been closed for at least 2 minutes. The system
will continue to operate regardless of the status of the filter switch.
8 Packaged Heat Pump • WC-IOM-7
Low Pressure Control
General Information
Compressor Disable (CPR1/2)
This input incorporates the low pressure control (LPC) of each refrigeration
circuit and can be activated by opening a field supplied contact installed on the
LTB .
If this circuit is open before the compressor is started, the compressor will not be
allowed to operate. Anytime this circuit is opened for 1 continuous second during
compressor operation, the compressor for that circuit is immediately turned
“Off”. The compressor will not be allowed to restart for a minimum of 3 minutes
should the contacts close.
If four consecutive open conditions occur during the first three minutes of
operation, the compressor for that circuit will be locked out, a diagnostic
communicated to the remote panel (if installed), and a manual reset will be
required to restart the compressor.
ReliaTel Control
When the LPC is opened for 1 continuous second, the compressor for that circuit
is turned off immediately. The compressor will not be allowed to restart for a
minimum of 3 minutes.
If four consecutive open conditions occur during the first three minutes of
operation, the compressor will be locked out, a diagnostic communicated to
ICSTM if applicable, and a manual reset will be required to restart the
compressor.
High Pressure Control (Optional)
ReliaTel Control
The high pressure controls are wired in series between the compressor outputs
on the RTRM and the compressor contactor coils. If the high pressure control
switch opens, the RTRM senses a lack of current while calling for cooling and
locks the compressor out.
On dual circuit units, if the high pressure control opens, the compressor on the
affected circuit is locked out. A manual reset for the affected circuit is required.
Power Exhaust Control (Optional)
The power exhaust fan is started whenever the position of the economizer
dampers meets or exceed the power exhaust setpoint when the indoor fan is on.
The setpoint panel is located in the return air section and is factory set at 25%.
WC-IOM-7 • Packaged Heat Pump 9
General Information
Lead/Lag Control (Dual Circuit Only)
Lead/Lag is a selectable input located on the RTRM. The RTRM is configured from
the factory with the Lead/Lag control disabled. To activate the Lead/Lag function,
simply cut the wire connected to J3-8 at the RTRM. When it is activated, each
time the designated lead compressor is shut off due to the load being satisfied,
the lead compressor or refrigeration circuit switches. When the RTRM is powered
up, i.e. after a power failure, the control will default to the number one circuit
compressor.
Zone Sensor Module (ZSM) (BAYSENS007B)
This electronic sensor features three system switch settings (Heat, Cool, and Off)
and two fan settings (On and Auto). It is a manual changeover control with single
setpoint. (Cooling Setpoint Only)
Zone Sensor Module (ZSM) (BAYSENS009B)
This electronic sensor features four system switch settings (Heat, Cool, Auto, and
Off) and two fan settings (On and Auto). It is a manual or auto changeover control
with dual setpoint capability. It can be used with a remote zone temperature
sensor BAYSENS017B.
Zone Sensor (BAYSENS011B)
This electronic sensor features four system switch settings (Heat, Cool, Auto, and
Off) and two fan settings (On and Auto) with four system status LED’s. It is a
manual or auto changeover control with dual setpoint capability. It can be used
with a remote zone temperature sensor BAYSENS017B.
Programmable Zone Sensor - BAYSENS019B
This 7 day programmable sensor features 2, 3 or 4 periods for Occupied or
Unoccupied programming per day. If the power is interrupted, the program is
retained in permanent memory. If power is off for an extended period of time,
only the clock and day may have to be reset.
The Zone Sensor allows selection of 2, 3 or 4 system modes (Heat, Cool, Auto,
and Off), two fan modes (On and Auto). It has dual temperature selection with
programmable start time capability.
The occupied cooling set point ranges between 45 and 98 degrees Fahrenheit.
The heating set point ranges between 43 and 96 degrees Fahrenheit.
A liquid crystal display (LCD) displays zone temperature, temperature set points,
day of the week, time, and operational mode symbols.
The Option Menu is used to enable or disable applicable functions, i.e.; Morning
Warm-up, Economizer minimum position override during unoccupied status,
Fahrenheit or Centigrade, Supply air tempering, Remote zone temperature
sensor, 12/24 hour time display, Smart fan, and Computed recovery.
10 Packaged Heat Pump • WC-IOM-7
General Information
Remote Zone Sensor (BAYSENS013C)
This electronic sensor features remote zone sensing and timed override with
override cancellation. It is used with a Trane Integrated ComfortTM building
management system.
Remote Zone Sensor (BAYSENS014C)
This electronic sensor features single setpoint capability and timed override with
override cancellation. It is used with a Trane Integrated ComfortTM building
management system.
Remote Zone Sensor (BAYSENS016A)
This bullet type temperature sensor can be used for; outside air (ambient)
sensing, return air temperature sensing, supply air temperature sensing, remote
temperature sensing (uncovered. Wiring procedures vary according to the
particular application and equipment involved. Refer to the unit’s wiring
diagrams for proper connections.
Remote Zone Sensor (BAYSENS017B)
This electronic sensor can be used with BAYSENS006B, 008B, 010B, 019B Remote
Panels. When this sensor is wired to a BAYSENS019B Remote Panel, wiring must
be 18 AWG Shielded Twisted Pair (Belden 8760 or equivalent). Refer to the
specific Remote Panel for wiring details.
High Temperature Sensor (BAYFRST001A)
This sensor connects to the RTRM Emergency Stop Input on the LTB and
provides high limit “shutdown” of the unit. The sensor is used to detect high
temperatures due to fire in the air conditioning or ventilation ducts. The sensor is
designed to mount directly to the sheet metal duct. Each kit contains two
sensors. The return air duct sensor (X1310004001) is set to open at 135°F. The
supply air duct sensor (X1310004002) is set to open at 240°F. The control can be
reset after the temperature has been lowered approximately 25°F below the
cutout setpoint.
Evaporator Frost Control
This input incorporates the Frostat™ control (FOS) mounted in the indoor coil
and can be activated by closing a field supplied contact installed in parallel with
the FOS.
If this circuit is open before the compressor is started, the compressor will not be
allowed to operate. Anytime this circuit is opened for 5 continuous seconds
during compressor operation, the compressor for that circuit is immediately
turned “Off”. The compressor will not be allowed to restart for a minimum of 3
minutes should the FOS close.
WC-IOM-7 • Packaged Heat Pump 11
General Information
Smoke Detector Sensor (Optional)
This sensor is only applicable on units equipped with a RTOM. It provides high
limit “shutdown” of the unit and requires a manual reset. The sensor is used to
detect smoke due to fire in the air conditioning or ventilation ducts.
Important: The supply and return air smoke detectors are designed to shut off the
unit if smoke is sensed in the supply air stream or return air stream. This function
is performed by sampling the airflow entering the unit at the return air opening.
Follow the instructions provided below to assure that the airflow through the unit
is sufficient for adequate sampling. Failure to follow these instructions will
prevent the smoke detectors from performing it's design function. Important:
Airflow through the unit is affected by the amount of dirt and debris accumulated
on the indoor coil and filters. To insure that airflow through the unit is adequate
for proper sampling by the return air smoke detector, complete adherence to the
maintenance procedures, including recommended intervals between filter
changes, and coil cleaning is required.
Note: Important! Periodic checks and maintenance procedures must be
performed on the smoke detector to insure that it will function properly.
For detailed instructions concerning these checks and procedures, refer to
the appropriate section(s) of the smoke detector Installation and
Maintenance Instructions provided with the literature package for this
unit.
Unit Inspection
In order for the supply air smoke detector or return air smoke detector to
properly sense smoke in the supply air stream or return air stream, the air
velocity entering the smoke detector unit must be between 500 and 4000 feet per
minute. Equipment covered in this manual will develop an airflow velocity that
falls within these limits over the entire airflow range specified in the evaporator
fan performance tables.
As soon as the unit arrives at the job site:
• Verify that the nameplate data matches the data on the sales order and bill of
lading (including electrical data).
• Verify that the power supply complies with the unit nameplate specifications.
• Visually inspect the exterior of the unit, including the roof, for signs of
shipping damage.
• Visually inspect the internal components for shipping damage as soon as
possible after delivery and before it is stored. Do not walk on the sheet metal
base pans.
• If concealed damage is discovered, notify the carrier’s terminal of damage
immediately by phone and by mail. Concealed damage must be reported
within 15 days.
Request an immediate joint inspection of the damage by the carrier and the
consignee. Do not remove damaged material from the receiving location.
12 Packaged Heat Pump • WC-IOM-7
General Information
Take photos of the damage, if possible. The owner must provide reasonable
evidence that the damage did not occur after delivery.
• Notify the appropriate sales representative before installing or repairing a
damaged unit.
WARNING
Fiberglass Wool
Product contains fiberglass wool. Disturbing the insulation in this product
during installation, maintenance or repair will expose you to airborne particles of
glass wool fibers and ceramic fibers known to the state of California to cause
cancer through inhalation. Glass wool fibers may also cause respiratory, skin or
eye irritation.
Precautionary Measures
• Avoid breathing fiberglass dust.
• Use a NIOSH approved dust/mist respirator.
• Avoid contact with the skin or eyes. Wear long-sleeved, loose-fitting
clothing, gloves, and eye protection.
Storage
• Wash clothes separately from other clothing: rinse washer
thoroughly.
• Operations such as sawing, blowing, tear-out, and spraying may
generate fiber concentrations requiring additional respiratory
protection. Use the appropriate NIOSH approved respiration in
these situations.
First Aid Measures
• Eye Contact - Flush eyes with water to remove dust. If symptoms
persist, seek medical attention.
• Skin Contact - Wash affected areas gently with soap and warm
water after handling.
Take precautions to prevent condensate from forming inside the unit’s electrical
compartments and motors if:
1. the unit is stored before it is installed; or,
2. the unit is set on the roof curb, and temporary heat is provided in the
building. Isolate all side panel service entrances and base pan openings (e.g.,
conduit holes, S/A and R/A openings, and flue openings) from the ambient air
until the unit is ready for start-up.
Note: Do not use the unit’s heater for temporary heat without first completing
the start-up procedure detailed under “Starting the Unit”.
WC-IOM-7 • Packaged Heat Pump 13
Unit Clearances
General Information
The manufacturer will not assume any responsibility for equipment damage
resulting from condensate accumulation on the unit’s electrical and/or
mechanical components.
Figure 1 illustrates the minimum operating and service clearances for either a
single or multiple unit installation. These clearances are the minimum distances
necessary to assure adequate serviceability, cataloged unit capacity, and peak
operating efficiency.
Providing less than the recommended clearances may result in condenser coil
starvation, “short-circuiting” of exhaust and economizer airflows, or recirculation
of hot condenser air.
14 Packaged Heat Pump • WC-IOM-7
Unit Dimensions
Figure 1. Typical Installation Clearances for Single & Multiple Unit Applications
WC-IOM-7 • Packaged Heat Pump 15
Unit Dimensions
Figure 2. Unit Dimensional Data 12 1/2 Ton, 15 Ton
Figure 3. Roof Curb Dimensional Data 12 1/2 Ton, 15 Ton
16 Packaged Heat Pump • WC-IOM-7
Unit Dimensions
Figure 4. Unit Dimensional Data 20 Ton
Figure 5. Roofcurb Dimensional Data 20 Ton
WC-IOM-7 • Packaged Heat Pump 17
Unit Dimensions
Figure 6. Horizontal Duct Dimensional Data 12 1/2 Ton, 15 Ton
Figure 7. Horizontal Duct Dimensional Data 20 Ton
18 Packaged Heat Pump • WC-IOM-7
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